====================================================== WARNING: possible circular locking dependency detected 6.4.0-rc3-syzkaller-geb0f1697d729 #0 Not tainted ------------------------------------------------------ syz-executor.4/10944 is trying to acquire lock: ffff000133732c00 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] ffff000133732c00 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}, at: ext4_xattr_inode_iget+0x3a8/0x4b8 fs/ext4/xattr.c:474 but task is already holding lock: ffff00013379c888 (&ei->i_data_sem){++++}-{3:3}, at: ext4_setattr+0x10a4/0x1628 fs/ext4/inode.c:5399 which lock already depends on the new lock. the existing dependency chain (in reverse order) is: -> #1 (&ei->i_data_sem){++++}-{3:3}: down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 ext4_update_i_disksize fs/ext4/ext4.h:3306 [inline] ext4_xattr_inode_write fs/ext4/xattr.c:1462 [inline] ext4_xattr_inode_lookup_create fs/ext4/xattr.c:1611 [inline] ext4_xattr_set_entry+0x2298/0x2c3c fs/ext4/xattr.c:1736 ext4_xattr_ibody_set+0x104/0x328 fs/ext4/xattr.c:2288 ext4_xattr_set_handle+0xa30/0x12d8 fs/ext4/xattr.c:2445 ext4_xattr_set+0x1e0/0x354 fs/ext4/xattr.c:2559 ext4_xattr_trusted_set+0x4c/0x64 fs/ext4/xattr_trusted.c:38 __vfs_setxattr+0x3d8/0x400 fs/xattr.c:201 __vfs_setxattr_noperm+0x110/0x528 fs/xattr.c:235 __vfs_setxattr_locked+0x1ec/0x218 fs/xattr.c:296 vfs_setxattr+0x1a8/0x344 fs/xattr.c:322 do_setxattr fs/xattr.c:630 [inline] setxattr+0x208/0x29c fs/xattr.c:653 path_setxattr+0x17c/0x258 fs/xattr.c:672 __do_sys_setxattr fs/xattr.c:688 [inline] __se_sys_setxattr fs/xattr.c:684 [inline] __arm64_sys_setxattr+0xbc/0xd8 fs/xattr.c:684 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 -> #0 (&ea_inode->i_rwsem#8/1){+.+.}-{3:3}: check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x3310/0x75f0 kernel/locking/lockdep.c:5074 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5691 down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:775 [inline] ext4_xattr_inode_iget+0x3a8/0x4b8 fs/ext4/xattr.c:474 ext4_xattr_inode_get+0x12c/0x37c fs/ext4/xattr.c:551 ext4_xattr_move_to_block fs/ext4/xattr.c:2641 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2743 [inline] ext4_expand_extra_isize_ea+0xbc8/0x16c0 fs/ext4/xattr.c:2835 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5771 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5814 [inline] __ext4_mark_inode_dirty+0x448/0x848 fs/ext4/inode.c:5892 ext4_setattr+0x110c/0x1628 fs/ext4/inode.c:5402 notify_change+0xa84/0xd20 fs/attr.c:483 do_truncate+0x1c0/0x28c fs/open.c:66 handle_truncate fs/namei.c:3295 [inline] do_open fs/namei.c:3640 [inline] path_openat+0x2130/0x27f8 fs/namei.c:3791 do_filp_open+0x1bc/0x3cc fs/namei.c:3818 do_sys_openat2+0x128/0x3d8 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1383 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591 other info that might help us debug this: Possible unsafe locking scenario: CPU0 CPU1 ---- ---- lock(&ei->i_data_sem); lock(&ea_inode->i_rwsem#8/1); lock(&ei->i_data_sem); lock(&ea_inode->i_rwsem#8/1); *** DEADLOCK *** 5 locks held by syz-executor.4/10944: #0: ffff000137028460 (sb_writers#3){.+.+}-{0:0}, at: mnt_want_write+0x44/0x9c fs/namespace.c:394 #1: ffff00013379ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: inode_lock include/linux/fs.h:775 [inline] #1: ffff00013379ca00 (&sb->s_type->i_mutex_key#8){++++}-{3:3}, at: do_truncate+0x1ac/0x28c fs/open.c:64 #2: ffff00013379cba0 (mapping.invalidate_lock){++++}-{3:3}, at: filemap_invalidate_lock include/linux/fs.h:820 [inline] #2: ffff00013379cba0 (mapping.invalidate_lock){++++}-{3:3}, at: ext4_setattr+0xc40/0x1628 fs/ext4/inode.c:5359 #3: ffff00013379c888 (&ei->i_data_sem){++++}-{3:3}, at: ext4_setattr+0x10a4/0x1628 fs/ext4/inode.c:5399 #4: ffff00013379c6c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_write_trylock_xattr fs/ext4/xattr.h:162 [inline] #4: ffff00013379c6c8 (&ei->xattr_sem){++++}-{3:3}, at: ext4_try_to_expand_extra_isize fs/ext4/inode.c:5811 [inline] #4: ffff00013379c6c8 (&ei->xattr_sem){++++}-{3:3}, at: __ext4_mark_inode_dirty+0x3c8/0x848 fs/ext4/inode.c:5892 stack backtrace: CPU: 0 PID: 10944 Comm: syz-executor.4 Not tainted 6.4.0-rc3-syzkaller-geb0f1697d729 #0 Hardware name: Google Google Compute Engine/Google Compute Engine, BIOS Google 04/28/2023 Call trace: dump_backtrace+0x1b8/0x1e4 arch/arm64/kernel/stacktrace.c:233 show_stack+0x2c/0x44 arch/arm64/kernel/stacktrace.c:240 __dump_stack lib/dump_stack.c:88 [inline] dump_stack_lvl+0xd0/0x124 lib/dump_stack.c:106 dump_stack+0x1c/0x28 lib/dump_stack.c:113 print_circular_bug+0x150/0x1b8 kernel/locking/lockdep.c:2066 check_noncircular+0x2cc/0x378 kernel/locking/lockdep.c:2188 check_prev_add kernel/locking/lockdep.c:3108 [inline] check_prevs_add kernel/locking/lockdep.c:3227 [inline] validate_chain kernel/locking/lockdep.c:3842 [inline] __lock_acquire+0x3310/0x75f0 kernel/locking/lockdep.c:5074 lock_acquire+0x23c/0x71c kernel/locking/lockdep.c:5691 down_write+0x50/0xc0 kernel/locking/rwsem.c:1573 inode_lock include/linux/fs.h:775 [inline] ext4_xattr_inode_iget+0x3a8/0x4b8 fs/ext4/xattr.c:474 ext4_xattr_inode_get+0x12c/0x37c fs/ext4/xattr.c:551 ext4_xattr_move_to_block fs/ext4/xattr.c:2641 [inline] ext4_xattr_make_inode_space fs/ext4/xattr.c:2743 [inline] ext4_expand_extra_isize_ea+0xbc8/0x16c0 fs/ext4/xattr.c:2835 __ext4_expand_extra_isize+0x290/0x348 fs/ext4/inode.c:5771 ext4_try_to_expand_extra_isize fs/ext4/inode.c:5814 [inline] __ext4_mark_inode_dirty+0x448/0x848 fs/ext4/inode.c:5892 ext4_setattr+0x110c/0x1628 fs/ext4/inode.c:5402 notify_change+0xa84/0xd20 fs/attr.c:483 do_truncate+0x1c0/0x28c fs/open.c:66 handle_truncate fs/namei.c:3295 [inline] do_open fs/namei.c:3640 [inline] path_openat+0x2130/0x27f8 fs/namei.c:3791 do_filp_open+0x1bc/0x3cc fs/namei.c:3818 do_sys_openat2+0x128/0x3d8 fs/open.c:1356 do_sys_open fs/open.c:1372 [inline] __do_sys_openat fs/open.c:1388 [inline] __se_sys_openat fs/open.c:1383 [inline] __arm64_sys_openat+0x1f0/0x240 fs/open.c:1383 __invoke_syscall arch/arm64/kernel/syscall.c:38 [inline] invoke_syscall+0x98/0x2c0 arch/arm64/kernel/syscall.c:52 el0_svc_common+0x138/0x258 arch/arm64/kernel/syscall.c:142 do_el0_svc+0x64/0x198 arch/arm64/kernel/syscall.c:193 el0_svc+0x4c/0x15c arch/arm64/kernel/entry-common.c:637 el0t_64_sync_handler+0x84/0xf0 arch/arm64/kernel/entry-common.c:655 el0t_64_sync+0x190/0x194 arch/arm64/kernel/entry.S:591